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Phoenix Contact 2858043 Surge Protection Plug

The PHOENIX CONTACT PT 3-HF-12DC-ST surge protection plug is a crucial component for safeguarding sensitive electronic equipment from voltage surges. Designed for use with base elements, it offers both coarse and fine protection for two floating signal wires and ground in IT systems, as well as coarse protection to ground/earth. This plug is particularly well-suited for protecting fieldbus systems, PROFIBUS, and signal circuits utilizing 3 to 5-wire technology. Its two-piece design simplifies maintenance, ensuring the base element remains an integral part of the installation. The plug also features impedance-neutral disconnection, allowing for convenient testing and maintenance without disrupting the circuit. It is compatible with CHECKMASTER for easy verification and boasts robust surge protection capabilities.

Authorized Distributors
Source:DigiKey
Part No:2858043
Stock:15
Inv Date:05-28-2026
Price: Unit price: $186
Buy/RFQ:
Part No:2858043
Stock:0
Inv Date:05-29-2026
Price: Unit price: $191.58
Buy/RFQ:
Part No:2858043
Stock:5
Inv Date:05-28-2026
Price: Unit price: $202.63
Buy/RFQ:

Phoenix Contact 2858043 Surge Protection Plug Specifications:

  • Packing unit: 1 pc
  • Weight per Piece (excluding packing): 20.73 g
  • Custom tariff number: 85363090
  • Country of origin: Germany
  • Height: 45 mm
  • Width: 17.7 mm
  • Depth: 52 mm
  • Horizontal pitch: 1 Div.
  • Complete module height: 90 mm
  • Complete module width: 17.7 mm
  • Complete module depth: 65.5 mm
  • Ambient temperature (operation): -40 °C ... 85 °C
  • Degree of protection: IP20
  • Housing material: PA
  • Flammability rating according to UL 94: V0
  • Color: black
  • Standards for cearances and creepage distances: DIN EN 61664-1, IEC 60664-1
  • Mounting type: On base element
  • Type: DIN rail module, two-section, divisible
  • Number of positions: 3
  • Direction of action: Line-Line & Line-Signal Ground/Shield & optional Signal Ground/Shield-Earth Ground
  • Arrester can be tested with CHECKMASTER from software version: From SW rev. 1.10
  • IEC test classification: C1, C2, C3, D1
  • VDE requirement class: C1, C2, C3, D1
  • Nominal voltage UN: 12 V DC
  • Maximum continuous voltage UC: 14 V DC, 9.8 V AC
  • Maximum continuous voltage UC(wire-wire): 14 V DC, 9.8 V AC
  • Maximum continuous voltage UC(wire-ground): 14 V DC (PT 1x2-BE)
  • Nominal current IN: 450 mA (45°C)
  • Operating effective current ICat UC: ≤ 5 µA
  • Residual current IPE: < 5 µA (PT 1x2-BE), < 1 µA (PT 1x2+F-BE)
  • Nominal discharge current In(8/20) µs (Core-Core): 10 kA
  • Nominal discharge current In(8/20) µs (Core-Earth): 10 kA
  • Nominal discharge current In(8/20) µs (Core-GND): 10 kA
  • Total surge current (8/20) µs: 20 kA
  • Max. discharge current Imax(8/20) µs maximum (Core-Core): 10 kA
  • Max. discharge current Imax(8/20) µs maximum (Core-Earth): 10 kA
  • Nominal pulse current Ian (10/1000) µs (Core-Core): 67 A
  • Impulse discharge current (10/350) µs, peak value limp: 2.5 kA
  • Output voltage limitation at 1 kV/µs (Core-Core) spike: ≤ 55 V
  • Output voltage limitation at 1 kV/µs (Core-Earth) spike: ≤ 55 V (PT 1x2-BE), ≤ 700 V (PT 1x2+F-BE)
  • Output voltage limitation at 1 kV/µs (Core-Core) static: ≤ 25 V
  • Output voltage limitation at 1 kV/µs (Core-Earth) static: ≤ 25 V, ≤ 40 V (PT 1x2+F-BE)
  • Residual voltage at In(conductor-conductor): ≤ 25 V
  • Residual voltage at In(conductor-ground): ≤ 40 V (PT 1x2-BE)
  • Residual voltage at In(conductor-GND): ≤ 25 V (PT 1x2-BE)
  • Residual voltage with Ian (10/1000)µs (conductor-conductor): ≤ 25 V
  • Residual voltage with Ian (10/1000)µs (conductor-GND): ≤ 25 V
  • Voltage protection level Up(core-core): ≤ 80 V (C1 - 1 kV/500 A), ≤ 50 V (C3 - 25 A), ≤ 100 V (C2 - 10 kV/5 kA), ≤ 80 V (6 kV/3 kA)
  • Voltage protection level Up(core-ground): ≤ 85 V (C1 - 1 kV/500 A), ≤ 140 V (C2 - 10 kV/5 kA), ≤ 100 V (6 kV/3 kA), ≤ 50 V (C3 - 25 A)
  • Voltage protection level Up(core-GND): ≤ 50 V (C3 - 25 A)
  • Response time tA (Core-Core): ≤ 500 ns
  • Response time tA (Core-Earth): ≤ 500 ns
  • Input attenuation aE, sym.: typ. 0.3 dB (≤ 5 MHz / 100 Ω)
  • Cut-off frequency fg (3 dB), sym. in 100 Ohm system: typ. 60 MHz
  • Capacity (Core-Core): typ. 30 pF
  • Resistance in series: 2.2 Ω ±10 % (7-8/11-12)
  • Surge protection fault message: None
  • Max. required back-up fuse: 500 mA (e.g. T in acc. with IEC 127-2/III)
  • Impulse durability (conductor-conductor): C2 - 10 kV/5 kA, C3 (67 A)
  • Impulse durability (conductor-ground): C2 - 10 kV/5 kA, C3 (67 A), D1 - 2,5 kA
  • Connection method: Screw connection (in connection with the base element)
  • Connection type IN: PLUGTRAB plug-in system
  • Connection type OUT: PLUGTRAB plug-in system
  • Screw thread: M3
  • Tightening torque: 0.8 Nm
  • Stripping length: 8 mm
  • Conductor cross section flexible min.: 0.2 mm²
  • Conductor cross section flexible max.: 2.5 mm²
  • Conductor cross section solid min.: 0.2 mm²
  • Conductor cross section solid max.: 4 mm²
  • Conductor cross section AWG min.: 24
  • Conductor cross section AWG max.: 12

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Frequently Asked Questions

Where can I buy Phoenix Contact 2858043?

You can click on the BUY or RFQ button to purchase 2858043 from an authorized Phoenix Contact distributor.

How do I troubleshoot issues or seek technical support for part 2858043?

You can download the 2858043 datasheet or visit the Phoenix Contact website for support.

Who is the manufacturer of 2858043?

Phoenix Contact

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